#include<stdio.h>
int main(void)
{
    int score[20],i;
    double sum = 0.0,aver;

    printf("Plese enter 20 student scores:");
    for(i=0;i<20;i++){
        scanf("%d ",&score[i]);
        sum += score[i];
    }

    printf("sum = %lf  aver = %lf",sum,sum/20);

    return 0;





}